Machine for grinding conical rollers



S. G. WINGQUIST AND B. W. FJELLMAN. MACHINE FOR GRlNDI NG CONICAL ROLLERS. APPLICATION FILED OCT. 18. 1919. 1,345,468.

Patented July 6; 1920.

INVENTORS:

By Alto akmm Dwvk I R rneys,

UNITED STATES PATENT OFFICE.

SVEN GUSTAF WINGQUIST AND BENGT WIKTOR FJ'ELLMAN, OF GOTTENBORG, SWEDEN, ASSIGNORS TO AKTIEBOLAGET SVENSKA KULLAGERFABRIKEN, OF GOTTENBORG, SWEDEN, A CORPORATION OF SWEDEN.

MACHINE FOR GRINDING CONIGAL ROLLERS.

Specification of Letters Patent.

Patented July 6, 1920.

Application filed October 18, 1919. Serial No. 331,736.

Gottenborg, Sweden, have invented new and useful Machines for Grinding Conical Rollers, of which the following is a specification. This invention relates to a machlne for grinding the superficies of conical rollers.

According to the invention the rollers are passed continuously through an uninterrupted series of grinding chambers connected with one another and each provided with two concentric and conical supporting or grinding surfaces between which the rollers rotate. v

A preferred embodiment of the invention is illustrated in the. accompanying drawing in which- Figure l is in part a side view and in part an axial section of the machine. Fig. 2 is a sectional view on line A-A in Fig. 1.

In the embodiment shown, 1 designates a series of grinding wheels placed one above another. The grinding'wheels are preferably attached to a sleeve 2 connected, by

means of key and key-way 3 or other suitable means, to a rotary shaft 4 in such manner that the sleeve is caused to partake of the rotation of the shaft, being, however, at the same time movable lengthwise on the same. The movement of the shaft is effected for instance by a pulley 5. The grinding wheels 1 are connected, preferably by meansof key and key-way 6, with the sleeve 2 thus being capable of moving in axial direction thereon but at the same time caused to rotate with the sleeve. The grinding wheels are suitably spaced apart by springs 7 placed between the wheels and preferably having the form of slit cups. Such a spring 7 situated beneath the lowermost grinding wheel rests on the bottom of a casing 8 surrounding the wheels. Aspring? is also placed above the vided with annular projections 10 bearing against the springs. Said projections may preferably consist of split rings inserted in annular recesses made in the sleeve. The split rings are kept together by the grinding wheels, each ring engaging an annular recess in the superposed wheel.

From the above it will be seen that each grinding wheel is movable in axial direction against the action of a spring 7 between two projections 10 on'the sleeve 2. The grinding wheels may however", though less advantageously, be rigidly connected, or even be made, if desired, in a single piece.

In order that the grinding Wheels may be loaded in a suitable manner, the sleeve 2 is connected, in the embodiment shown, with a sleeve 11 secured by means of lugs 12 to a lever 14 journaled on a shaft 13 and the free end of which may be loaded by weights 15. If desired, the load may also be applied at the top, for instance to the uppermost grinding wheel. i

The inner surface of the casing 8 is provided with a series of conical grinding surfaces 16. The apex of each of said surfaces coincides with the apex of the conical surface of the adjacent grinding wheel, as shown by dotted lines in connection with the two uppermost grinding surfaces. The rollers 17 to be ground are inserted between the grinding wheels and the grinding surfaces 16.

Of course, the grinding surfaces may be produced in various manners. In the embodiment shown in the drawing the grinding wheels 1 and the casing 8 are supposed to be made of cast-iron. The grinding is performed by means of emery powder supplied through a pipe 18. The grinding wheels or the casing or both of them' may, however, consist of emery or other grinding material. I

In order to obtain a uniform grinding operation, the rollers are caused to circulate through the different grinding chambers. To this purpose the inner side of the casing 8 is in each grinding chamber provided with a stripping rail 19 (Fig. 2) causing the rollers to enter a channel 20 made in the casing 8 and through which the rollers are removed from a grinding chamber to the next lower chamber. In Fig. 1 the upper ranged otherwise, for instance in such manner that the rollers are moved from the uppermost grinding chamber to'the' third one from above, from this to the fifth one from above and so on, and from the last chamber to the last but one, and from this through each other chamber upward to the second one from above and finally from this back to the uppermost chamber. The channels should be so shaped that the rollers can move therein with the least possible sliding friction.

For facilitating the construction of the channels the casing 8 is provided with an outer cover 22 in which part of the channel 21 is recessed.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is tobe performed, we declare that What we claim 1. Machine for grinding the superficies of conical rollers, comprising outer and inner grinding means forming a plurality of annular grinding chambers having each-an outer and inner conical grinding face, and means for causing the rollers to circulate from one such chamber-to. another.

2. Machine for grinding the superficies of conical rollers, comprising a rotating shaft, conical grinding wheels connected with said shaft, a casing surrounding said grinding wheels and provided with a grinding surface opposite each grinding wheel forming a plurality of annular grinding chambers, stripping members in said casing, and means for conveying the rollers from one chamber to another.

Machine for grinding the superficies of conical rollers, comprising a rotating shaft, conical grinding wheels connected with said shaft-and movable in its longitudinal direction, a casing surrounding said grinding wheels and provided with a. conical grinding surface opposite each grinding wheel forming a plurality of annular grinding chambers having each outer and inner conical grinding faces, and means for conveying the rollers to and from the respective chambers.

4. Machine for grinding the superficies of conical rollers, comprisin a rotating shaft, a sleeve rotating with said shaft and movable lengthwise thereon, conical grinding wheel-s connected with said sleeve, a casing surrounding said grinding wheels and provided with a conical grinding surface opposite each grinding wheel, stripping members in said casing, and means for conveying the rollers from one chamber to another.

'5. Machine for. grinding the superficies of conical rollers, comprising a rotating shaft; conical grinding wheels connected with said shaft and movable in its longitudinal direction, and a casing surrounding said grintb ing Wheels and provided with grinding surfaces. opposite the respective grinding wheels, forming a plurality of annular grinding chambers having each conical outer and inner grinding faces.

' 6. Machine for grinding the superficies of conical rollers, comprising a rotating shaft,

conical grinding wheels connected with said shaft and placed one above.another, said grinding wheels being movable in the longitudinal direction of the shaft, a casing surrounding said grinding wheels and provided with a grinding surface opposite each grinding wheel, and spacing spring devices placed between adjacent grinding wheels and between the lowermost wheel and the casing.

7. Machine for grinding the superficies of conical rollers, comprising a rotating shaft,

a sleeve rotating with said shaft and movable lengthwise thereon, conical grinding wheels connected with said sleeve and movable in its longitudinal direction, projections on the sleeve adapted to limit the axial motion of the grinding wheels, a casing surrounding said grinding wheels and provided with a grinding surface opposite each grinding wheel, and spacing spring devices placed between adjacent grinding wheels and between the lowermost wheel and the -asing.

8. Machine for grinding the superficies of conical rollers, comprising a rotating shaft, a sleeve rotating with said shaft and movable lengthwise thereon, conical grinding wheels connected with said sleeve and movable in its longitudinal direction, split rings inserted in the sleeve and entering recesses in the grinding wheels, said split rings being arranged to limit the axial motion of said wheels, a casing surrounding said grindv ing wheels and provided with a grinding surface opposite each grinding wheel, and spacing spring devices placed between adjacent grinding wheels and between the lowermost wheel and the casing.

9. Machine for grinding the superficies of conical rollers. comprising .a rotating shaft, a sleeve rotating with said shaft and movable lengthwise thereon. conical grinding wheels connected with said sleeve and movable in its longitudinal direction, means for loading said sleeve, a casing surrounding said grinding wheels and provided with a grinding surface opposite each grindin wheel, and spacing spring devices placer between adjacent grinding wheels-and be; tween the lowermost wheel andi't'he casing,

10. Machine for grinding the superficies of conical rollers, comprising a rotating shaft, a sleeve rotating with said shaft and movable lengthwise thereon, conical grinding wheels connected with said sleeve and movable in its longitudinal direction, means for loading said sleeve, a casing surrounding said grinding wheels and provided with a grinding surface opposite each grinding wheel, and spacing spring devices placed between adjacent grlnding wheels and between the lowermost wheel andthe casing.

11. Machine for grinding the superficies of conical rollers, comprising a rotating shaft, a sleeve rotating with said shaft and movable lengthwise thereon, conical grinding Wheels connected with said sleeve and movable in its longitudinal direction, a casing surrounding said grinding wheels having grinding faces forming with said grinding wheels annular grinding chambers, spacing spring devices placed between adjacent grinding wheels and between the lowermost wheel and the casing, means for loading said sleeve, stripping members in said casing, and channels arranged to con vey the rollers from one chamber to another.

- In testimony whereof we'have signed our names.

SVEN GUSTAF WINGQUIST. BEN GT WIKTOR FJELLMAN. 

